Below is an example (using Terminal) of setting up an APFS Time Machine volume in Big Sur including a disk quota (150GB in the example).
Note the volume name (disk5 in the example) should be set the required APFS Container disk. Also note that "phrase" and "hint" should be specified (can be remembered in Keychain).
- Pie Lover
Mac mini 2018 or later
One last point, you have to be logged into an admin account for the system to prompt you to set up Time Machine using the newly created volume.
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When using the Disk Utility, any quota specified for the APFS volume doesn't carryover once configure for Time Machine. This is especially important if the Time Machine is sharing its APFS Container with other volumes.
Correct. Role T is for Time Machine and APFSX specifies a Case-sensitive volume. Big Sur also requires encryption for Macs using the T2 chip (e.g. my Mac mini (2018)).
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Is there some benefit to doing this in Terminal as opposed to using Disk Utility?
Or, is this just a how-to if you need to use Terminal?
Maybe it is sort of obvious, but noting the role=T sets it as a Time Machine backup volume would be helpful.
Additionally, APFSX is the Case-sensitive APFS file system which Time Machine uses for APFS backup volumes.
Big Sur APFS TM Setup with Quota Specified
